adding files

1 files changed, 22 insertions, 0 deletions

diff --git a/nghdl/Example/counter/counter.vhdl b/nghdl/Example/counter/counter.vhdl
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+++ b/nghdl/Example/counter/counter.vhdl
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+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity counter is
+port(C : in std_logic;
+     CLR : in std_logic;
+     Q : out std_logic_vector(3 downto 0));
+end counter;
+architecture bhv of counter is
+signal tmp: std_logic_vector(3 downto 0);
+begin
+process (C, CLR)
+begin
+if (CLR='1') then
+tmp <= "0000";
+elsif (C'event and C='1') then
+tmp <= std_logic_vector(to_unsigned(1+to_integer(unsigned(tmp)), tmp'length));
+end if;
+end process;
+Q <= tmp;
+end bhv;
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